[minor] Replace echo.websocket.org with websocket-echo.com

The echo.websocket.org service is no longer available.

README.md

@@ -33,7 +33,7 @@ can use one of the many wrappers available on npm, like
   - [Multiple servers sharing a single HTTP/S server](#multiple-servers-sharing-a-single-https-server)
   - [Client authentication](#client-authentication)
   - [Server broadcast](#server-broadcast)
-  - [echo.websocket.org demo](#echowebsocketorg-demo)
+  - [Round-trip time](#round-trip-time)
   - [Use the Node.js streams API](#use-the-nodejs-streams-api)
   - [Other examples](#other-examples)
 - [FAQ](#faq)
@@ -324,14 +324,12 @@ wss.on('connection', function connection(ws) {
 });
 ```
 
-### echo.websocket.org demo
+### Round-trip time
 
 ```js
 import WebSocket from 'ws';
 
-const ws = new WebSocket('wss://echo.websocket.org/', {
-  origin: 'https://websocket.org'
-});
+const ws = new WebSocket('wss://websocket-echo.com/');
 
 ws.on('open', function open() {
   console.log('connected');
@@ -343,7 +341,7 @@ ws.on('close', function close() {
 });
 
 ws.on('message', function message(data) {
-  console.log(`Roundtrip time: ${Date.now() - data} ms`);
+  console.log(`Round-trip time: ${Date.now() - data} ms`);
 
   setTimeout(function timeout() {
     ws.send(Date.now());
@@ -356,9 +354,7 @@ ws.on('message', function message(data) {
 ```js
 import WebSocket, { createWebSocketStream } from 'ws';
 
-const ws = new WebSocket('wss://echo.websocket.org/', {
-  origin: 'https://websocket.org'
-});
+const ws = new WebSocket('wss://websocket-echo.com/');
 
 const duplex = createWebSocketStream(ws, { encoding: 'utf8' });
 
@@ -457,7 +453,7 @@ function heartbeat() {
   }, 30000 + 1000);
 }
 
-const client = new WebSocket('wss://echo.websocket.org/');
+const client = new WebSocket('wss://websocket-echo.com/');
 
 client.on('open', heartbeat);
 client.on('ping', heartbeat);

test/websocket.integration.js

@@ -6,8 +6,7 @@ const WebSocket = require('..');
 
 describe('WebSocket', () => {
   it('communicates successfully with echo service (ws)', (done) => {
-    const ws = new WebSocket('ws://echo.websocket.org/', {
-      origin: 'http://www.websocket.org',
+    const ws = new WebSocket('ws://websocket-echo.com/', {
       protocolVersion: 13
     });
     const str = Date.now().toString();
@@ -27,8 +26,7 @@ describe('WebSocket', () => {
   });
 
   it('communicates successfully with echo service (wss)', (done) => {
-    const ws = new WebSocket('wss://echo.websocket.org/', {
-      origin: 'https://www.websocket.org',
+    const ws = new WebSocket('wss://websocket-echo.com/', {
       protocolVersion: 13
     });
     const str = Date.now().toString();

test/websocket.test.js

@@ -33,7 +33,7 @@ describe('WebSocket', () => {
       );
 
       assert.throws(
-        () => new WebSocket('https://echo.websocket.org'),
+        () => new WebSocket('https://websocket-echo.com'),
         /^SyntaxError: The URL's protocol must be one of "ws:", "wss:", or "ws\+unix:"$/
       );
 
@@ -43,7 +43,7 @@ describe('WebSocket', () => {
       );
 
       assert.throws(
-        () => new WebSocket('wss://echo.websocket.org#foo'),
+        () => new WebSocket('wss://websocket-echo.com#foo'),
         /^SyntaxError: The URL contains a fragment identifier$/
       );
     });